DE69623224D1 - Servo tracker for optical disks - Google Patents

Servo tracker for optical disks

Info

Publication number
DE69623224D1
DE69623224D1 DE69623224T DE69623224T DE69623224D1 DE 69623224 D1 DE69623224 D1 DE 69623224D1 DE 69623224 T DE69623224 T DE 69623224T DE 69623224 T DE69623224 T DE 69623224T DE 69623224 D1 DE69623224 D1 DE 69623224D1
Authority
DE
Germany
Prior art keywords
optical disks
servo tracker
tracker
servo
disks
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE69623224T
Other languages
German (de)
Inventor
Yasuo Sasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of DE69623224D1 publication Critical patent/DE69623224D1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/13—Optical detectors therefor
    • G11B7/131—Arrangement of detectors in a multiple array
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08517—Methods for track change, selection or preliminary positioning by moving the head with tracking pull-in only
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08541—Methods for track change, selection or preliminary positioning by moving the head involving track counting to determine position
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/094—Methods and circuits for servo offset compensation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10556—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
    • G11B11/10563—Access of indexed parts
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0943—Methods and circuits for performing mathematical operations on individual detector segment outputs
DE69623224T 1995-10-19 1996-10-18 Servo tracker for optical disks Expired - Lifetime DE69623224D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29626895A JP3550836B2 (en) 1995-10-19 1995-10-19 Tracking servo device and tracking servo method in optical device

Publications (1)

Publication Number Publication Date
DE69623224D1 true DE69623224D1 (en) 2002-10-02

Family

ID=17831378

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69623224T Expired - Lifetime DE69623224D1 (en) 1995-10-19 1996-10-18 Servo tracker for optical disks

Country Status (5)

Country Link
US (2) US5930211A (en)
EP (3) EP1089266A1 (en)
JP (1) JP3550836B2 (en)
KR (1) KR100462914B1 (en)
DE (1) DE69623224D1 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19748188A1 (en) * 1997-10-31 1999-05-06 Thomson Brandt Gmbh Device for reading or writing to optical recording media
JP3882303B2 (en) * 1997-12-26 2007-02-14 ソニー株式会社 Optical disc recording and / or reproducing apparatus and optical disc tracking control method
JP3645711B2 (en) * 1998-05-27 2005-05-11 松下電器産業株式会社 Optical disc apparatus and optical disc control method
US6459664B1 (en) * 1998-08-31 2002-10-01 Matsushita Electric Industrial Co., Ltd. Optical disc tilt control apparatus
JP3384336B2 (en) * 1998-09-03 2003-03-10 ティアック株式会社 Information storage device
JP4258046B2 (en) * 1998-11-17 2009-04-30 ソニー株式会社 Disk drive device
JP3503513B2 (en) * 1999-02-22 2004-03-08 ヤマハ株式会社 Optical disk recording method and apparatus
CN1302433A (en) * 1999-02-26 2001-07-04 松下电器产业株式会社 Optical information recording/reproducing device
JP2000322743A (en) * 1999-05-13 2000-11-24 Sony Precision Technology Inc Measuring method and measuring device of crosstalk of optical disk
US6633520B1 (en) * 1999-06-14 2003-10-14 Oak Technology, Inc. Method and apparatus for searching in a disk drive
US6798724B1 (en) * 2000-06-01 2004-09-28 Hewlett-Packard Development Company, L.P. Low cost detection of wobble inversions using a tuned circuit
JP2003203366A (en) * 2002-01-09 2003-07-18 Texas Instr Japan Ltd Servo error detector for optical disk
US6982935B2 (en) * 2002-02-01 2006-01-03 Discovision Associates Pause control for a media player with a movable pickup
DE102004019692A1 (en) 2004-04-20 2005-11-10 Deutsche Thomson-Brandt Gmbh Method and device for tracking in optical recording media
JP2007272972A (en) * 2006-03-30 2007-10-18 Sharp Corp Pre-stage amplifying circuit, light receiving amplifying circuit, and optical pickup device
US11557319B1 (en) * 2021-08-24 2023-01-17 Seagate Technology Llc Read offset calibration for error recovery
US11568895B1 (en) 2021-09-03 2023-01-31 Seagate Technology Llc Read offset calibration for error recovery

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1270559A (en) * 1985-10-30 1990-06-19 Shigeo Terashima Tracking circuit for an optical information recording and reproducing apparatus
US4866688A (en) * 1985-12-20 1989-09-12 Hitachi, Ltd. Composite tracking servo system for optical disc apparatus with track offset correction
JPS62267929A (en) * 1986-05-16 1987-11-20 Hitachi Ltd Tracking control circuit for recording and reproduction type optical disk device
JPS6450244A (en) * 1987-08-20 1989-02-27 Fujitsu General Ltd Optical disk recording and reproducing device
JPH01211326A (en) * 1988-02-19 1989-08-24 Matsushita Electric Ind Co Ltd Actuator driving circuit
JPH02285526A (en) * 1989-04-27 1990-11-22 Olympus Optical Co Ltd Offset corrector for tracking servo loop
JPH0322831A (en) * 1989-06-20 1991-01-31 Matsushita Electric Ind Co Ltd Power supply circuit
JPH0721868B2 (en) * 1989-08-04 1995-03-08 キヤノン株式会社 Optical information processing device
JP2593941B2 (en) * 1989-08-19 1997-03-26 富士通株式会社 Actuator offset removal device for optical disk drive
JPH03130972A (en) * 1989-10-16 1991-06-04 Matsushita Electric Ind Co Ltd Track retrieving device and tracking controller
US5253239A (en) * 1989-11-24 1993-10-12 Matsushita Electric Industrial Co., Ltd. Control apparatus for tracking a light beam on a track of an optical recording medium
JPH03228231A (en) * 1990-02-01 1991-10-09 Matsushita Electric Ind Co Ltd Tracking offset correction device, tracking error detection device, and tracking controller using said correction/detection devices
JPH0453036A (en) * 1990-06-20 1992-02-20 Hitachi Maxell Ltd Optical information recording and reproducing device
US5210732A (en) * 1990-11-27 1993-05-11 Matsushita Electric Industrial Co., Ltd. Optical disk apparatus
JPH04219633A (en) * 1990-12-19 1992-08-10 Mitsubishi Electric Corp Tracking device
JPH04313818A (en) * 1991-01-30 1992-11-05 Pioneer Electron Corp Actuator position detecting device, actuator position controller and track searching controller
JP2682748B2 (en) * 1991-03-05 1997-11-26 富士通株式会社 Track crossing signal generation circuit for optical recording medium
JP3051526B2 (en) * 1991-11-08 2000-06-12 パイオニア株式会社 Servo device for optical head in optical recording / reproducing device
JPH0734879B2 (en) 1992-03-17 1995-04-19 三菱化工機株式会社 Centrifuge for liquid-liquid separation
JP3237237B2 (en) * 1992-10-16 2001-12-10 ソニー株式会社 Optical head device, optical disk device, and tracking error detection method
JPH06139587A (en) * 1992-10-29 1994-05-20 Taiyo Yuden Co Ltd Method and device for recording and reproducing information in optical disk
US5517474A (en) * 1993-03-02 1996-05-14 Matsushita Electric Industrial Co., Ltd. Tracking controller for correcting a tracking error offset
KR100365610B1 (en) 1994-05-17 2003-03-06 소니 가부시끼 가이샤 Tracking Servo and Track Counting Device
JPH08306054A (en) * 1995-04-28 1996-11-22 Sony Corp Tracking servo circuit
JP3063596B2 (en) * 1995-11-24 2000-07-12 三菱電機株式会社 Optical disk device and optical disk
JP3092510B2 (en) * 1996-04-15 2000-09-25 三菱電機株式会社 Optical disk medium and optical disk device

Also Published As

Publication number Publication date
JP3550836B2 (en) 2004-08-04
EP1089267A1 (en) 2001-04-04
US6233208B1 (en) 2001-05-15
EP0769776A1 (en) 1997-04-23
KR100462914B1 (en) 2005-04-19
EP0769776B1 (en) 2002-08-28
JPH09115153A (en) 1997-05-02
KR970023039A (en) 1997-05-30
EP1089266A1 (en) 2001-04-04
US5930211A (en) 1999-07-27

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Legal Events

Date Code Title Description
8332 No legal effect for de